Builders Parts is a line of plastic accessories and effect parts kits for Gunpla from the Gundam meta series. The BP line is split into three lines: System Weapon (BPSW), System Base (BPSB) and Builders Parts HD (BPHD). This collection of custom parts features a vriety of different vernier and booster nozzles, 16 total and their acompanying bases for you to attach